520518385 has 8 divisors (see below), whose sum is σ = 624799296. Its totient is φ = 416296560.

The previous prime is 520518367. The next prime is 520518407. The reversal of 520518385 is 583815025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520518385 - 2⁹ = 520517873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7732 + ... + 33178.

It is an arithmetic number, because the mean of its divisors is an integer number (78099912).

Almost surely, 2^520518385 is an apocalyptic number.

It is an amenable number.

520518385 is a deficient number, since it is larger than the sum of its proper divisors (104280911).

520518385 is a wasteful number, since it uses less digits than its factorization.

520518385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29543.

The product of its (nonzero) digits is 48000, while the sum is 37.

The square root of 520518385 is about 22814.8720136669. The cubic root of 520518385 is about 804.4122788591.

The spelling of 520518385 in words is "five hundred twenty million, five hundred eighteen thousand, three hundred eighty-five".